Title Difficulty Companies Videos
Balanced Binary Tree Problem Easy adobe amazon apple bloomberg bytedance cisco facebook google microsoft
Binary Tree Path Sum - Maximum between any two nodes Hard adobe amazon appdynamics apple baidu bloomberg bytedance facebook google intuit microsoft twitter uber vmware
Binary Tree Traversal - Zigzag Level Order Traversal Medium amazon apple bloomberg bytedance ebay facebook google linkedin microsoft oracle qualtrics samsung servicenow yahoo
Construct Binary Tree from Inorder and Postorder Traversal Medium amazon bloomberg facebook google mathworks microsoft twitter
Construct Binary Tree from Inorder and Preorder Traversal Medium adobe amazon apple bloomberg bytedance citadel facebook google microsoft oracle square twitter yahoo
Contains Duplicate 2 - within k distance Easy adobe airbnb amazon apple bloomberg google microsoft palantir-technologies
Convert Sorted List into a height-balanced Binary search Tree Medium amazon bloomberg facebook google lyft microsoft oracle vmware zenefits
Count of Smaller Numbers After Self Hard adobe amazon apple bloomberg facebook google microsoft oracle uber
Count Primes Medium adobe amazon apple bloomberg capital-one ebay facebook goldman-sachs google intel microsoft oracle yahoo yandex
Find Median from Data Stream Hard adobe amazon apple atlassian bloomberg bytedance citadel ebay expedia facebook goldman-sachs google microsoft netflix oracle pinterest qualtrics salesforce snapchat twitter uber vmware yahoo
Find Peak Element in a Given Array Medium amazon apple bloomberg bytedance facebook google ixl lyft microsoft quora uber vmware yahoo
Largest Rectangle in Histogram Hard adobe amazon bloomberg facebook flipkart google microsoft twitter
Maximum Number of Occurrences of a Substring Problem Medium bloomberg paypal roblox
Merge K Sorted Lists Hard adobe airbnb alibaba amazon apple atlassian audible bloomberg box bytedance cisco cohesity cruise-automation ebay facebook goldman-sachs google indeed ixl linkedin lyft mathworks microsoft nvidia oracle salesforce sap tableau twitter uber vmware wish yahoo yandex zillow
Minimum Insertion Steps to Make a String Palindrome Problem Hard bloomberg google quora
Nim Game Easy adobe bloomberg
Odd Even Linked List - Bring odd nodes first and even later Medium amazon bloomberg capital-one ebay facebook google microsoft
Palindrome Pairs Hard airbnb amazon apple bloomberg facebook google square uber
Palindrome Permutation Easy amazon apple bloomberg facebook google microsoft uber
Populate next pointer to right node in Binary Tree Medium amazon bloomberg facebook google microsoft oracle
Reconstruct Itinerary Problem Hard amazon apple bloomberg citadel facebook goldman-sachs google microsoft qualtrics snapchat square twilio uber yandex yelp
Remove Invalid Parentheses Problem Hard amazon apple bloomberg facebook google houzz ponyai postmates uber
Remove K Digits Problem Medium adobe amazon bloomberg bytedance didi facebook google microsoft nutanix oracle snapchat vmware
Reverse Words in a String 3 Easy amazon apple bloomberg microsoft paypal salesforce snapchat yahoo zappos
Rotate n x n matrix by 90 degrees Medium adobe akuna-capital amazon apple bloomberg cisco facebook google groupon houzz lyft microsoft nvidia palantir palantir-technologies quora salesforce uber wish yandex
Search in Rotated Sorted Array 2 - Check if number exists - Duplicates allowed Medium adobe amazon bloomberg facebook google microsoft
Select Copy Paste Problem 1 - Minimum operations Medium bloomberg microsoft
Serialize and Deserialize Binary Tree Hard amazon apple bloomberg citadel ebay expedia facebook google groupon indeed linkedin microsoft oracle qualtrics quora salesforce snapchat tableau uber vmware yahoo
Shortest Palindrome 1 - Prepending characters Hard adobe amazon bloomberg facebook google microsoft oracle pocket-gems
Sort Characters By Frequency Medium amazon bloomberg expedia facebook google linkedin uber
Spiral Matrix 1 - Return Medium adobe amazon apple bloomberg bytedance cisco drawbridge ebay epic-systems facebook goldman-sachs google hulu linkedin microsoft oracle paypal quip robinhood snapchat uber visa
Square root of an integer Easy amazon apple bloomberg facebook google huawei linkedin lyft microsoft qualtrics uber wayfair
Swap Nodes in Pairs Medium adobe amazon apple bloomberg ebay facebook google lyft microsoft oracle sap uber
Valid Parenthesis String Medium alibaba amazon bloomberg facebook google
Valid Sudoku Problem Medium adobe amazon apple bloomberg cruise-automation doordash facebook google microsoft oracle pinterest roblox salesforce snapchat twitter uber vmware
Validate Binary Search Tree Medium adobe amazon apple asana atlassian bloomberg bytedance capital-one ebay facebook goldman-sachs google linkedin mathworks microsoft oracle salesforce sap tripadvisor uber visa vmware yahoo yandex
Word Break 2 - Construct a sentence Hard amazon apple audible bloomberg bookingcom dropbox ebay facebook google microsoft oracle pinterest snapchat twitter uber zillow
Implement Rand10() Using Rand7() Medium apple bloomberg bytedance linkedin microsoft
Permutation in String Problem Medium amazon bloomberg facebook google lyft microsoft uber yahoo yandex
Remove All Adjacent Duplicates In String 1 Easy amazon bloomberg facebook google oracle paypal paytm
Find Duplicate Subtrees Medium amazon bloomberg facebook google lyft microsoft oracle uber
Max Area of Island Problem Medium adobe affirm amazon apple bloomberg bytedance cruise-automation doordash facebook google intuit mathworks microsoft oracle palantir-technologies qualtrics twitch uber wish zillow
Number of Provinces Medium adobe amazon atlassian bloomberg drawbridge ebay facebook goldman-sachs google linkedin microsoft pocket-gems salesforce twitter two-sigma uber
Subarray Sum Equals K Medium adobe amazon apple bloomberg ebay expedia facebook goldman-sachs google indeed linkedin microsoft oracle quora snapchat twilio uber wish yahoo yandex
Island Perimeter Problem Easy amazon apple bloomberg facebook google microsoft
All O`one Data Structure Problem Hard amazon bloomberg facebook google linkedin microsoft uber
Flatten a Multilevel Doubly Linked List Problem Medium amazon apple bloomberg facebook google microsoft uber
Valid Word Square Easy bloomberg google
Add Strings Problem Easy adobe airbnb amazon apple bloomberg bytedance facebook google microsoft nvidia oracle snapchat square
Daily Temperatures Medium adobe amazon apple bloomberg cisco expedia facebook goldman-sachs google linkedin microsoft nvidia uber zillow